diff --git a/Makefile b/Makefile
index 96b7def9..8e97cf3b 100644
--- a/Makefile
+++ b/Makefile
@@ -146,7 +146,11 @@ chibi-scheme-ulimit$(EXE): main.o $(SEXP_ULIMIT_OBJS) $(EVAL_OBJS)
 	$(CC) $(XCFLAGS) $(STATICFLAGS) -o $@ $^ $(LDFLAGS) $(GCLDFLAGS) $(STATIC_LDFLAGS)
 
 clibs.c: $(GENSTATIC) $(CHIBI_DEPENDENCIES) $(COMPILED_LIBS:%$(SO)=%.c)
-	$(GIT) ls-files lib | $(GREP) .sld | $(CHIBI) -q $(GENSTATIC) > $@
+	if [ -d .git ]; then \
+		$(GIT) ls-files lib | $(GREP) .sld | $(CHIBI) -q $(GENSTATIC) > $@; \
+	else \
+		$(FIND) lib -name \*.sld | $(CHIBI) -q $(GENSTATIC) > $@; \
+	fi
 
 chibi-scheme.pc: chibi-scheme.pc.in
 	echo "# pkg-config" > chibi-scheme.pc